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△ABC中,A=,BC=3,则△ABC的周长为A.4sin(B+)+3B.4sin(B+)...
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△ABC中,A=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMZJREFU
OE/FlOENxCAIhbmVWYdNmIMpWIJTQOMpF/+1JE2MfYUHfOnHWsAtuugWcBN4pcdFYgTQOzweZHU3
IEQm7aBM5nfKhsgWryOmcSEMkZBBLVJjjIwuIj9tmXoJGGWxEvUszXSWUG6iPAtzevIsYKMTN56d
jqrPT/y+4o5buZJx/w4qufnhbdtbemo8za0HW7sOTPWHHaFKtI6pwGSDLudVe1pS7UTs+A7pytPB
+Mz3F9+pCErPEfQvlyUXvl/4F9zJ/ALF9k9a19NXMAAAAABJRU5ErkJggg==
)
,BC=3,则△ABC的周长为( )
A.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAALtJREFU
OE/Nk9sVhCAMRENH9EMXFEET9EAB1ME59pAmsgmPFRF15Wv5UuQymUlUxAuGpZQat+bvAo+LT862
z+f+HMZIlq2IHfDpW+zU3NFzIm8jYUb4mS9o/DOMWMEimPwbuE80+bdl74oLnjvpGpyNJYFnz8Mg
YLQENUCgYEoLwOwtuJuwzjeEEDLkNJB2WynnEkaKdpZ2rqCoH2BRagPS9fjk2fBHUV/6MTanCbRb
g6UUUV9SbnH/Cn8A/r2EUaEPy7EAAAAASUVORK5CYII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMZJREFU
OE/FlOENxCAIhbmVWYdNmIMpWIJTQOMpF/+1JE2MfYUHfOnHWsAtuugWcBN4pcdFYgTQOzweZHU3
IEQm7aBM5nfKhsgWryOmcSEMkZBBLVJjjIwuIj9tmXoJGGWxEvUszXSWUG6iPAtzevIsYKMTN56d
jqrPT/y+4o5buZJx/w4qufnhbdtbemo8za0HW7sOTPWHHaFKtI6pwGSDLudVe1pS7UTs+A7pytPB
+Mz3F9+pCErPEfQvlyUXvl/4F9zJ/ALF9k9a19NXMAAAAABJRU5ErkJggg==
)
)+3
B.4
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAALtJREFU
OE/Nk9sVhCAMRENH9EMXFEET9EAB1ME59pAmsgmPFRF15Wv5UuQymUlUxAuGpZQat+bvAo+LT862
z+f+HMZIlq2IHfDpW+zU3NFzIm8jYUb4mS9o/DOMWMEimPwbuE80+bdl74oLnjvpGpyNJYFnz8Mg
YLQENUCgYEoLwOwtuJuwzjeEEDLkNJB2WynnEkaKdpZ2rqCoH2BRagPS9fjk2fBHUV/6MTanCbRb
g6UUUV9SbnH/Cn8A/r2EUaEPy7EAAAAASUVORK5CYII=
)
sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAANJJREFU
OE/FU9sNxDAI41bOOmzCHEyRJSivRGnKXf56SJWi1MImNh/RglMZ6FRwAjjT6yAWBLAJH1+j7mqA
EYX10AnF7zpJayTxO2oKZ2wBYhSoQV2oRUcHoZ+2TkYBg7ZVIOuiopOik4LyzESpybuAjElceE46
WN9/8bPFFrfSknH/n6gswudDptl7CtwOuP+8R8WcT4OrB1FbwmDU8I2xt6Ro6LILcmSoooU1GkEV
mV+7FaCgn9HxjD9Ep8YlwVP4zPX3RVh3LxeiWqlfgXk5vhcoRz5Wn9bxVgAAAABJRU5ErkJggg==
)
)+3
C.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMZJREFU
OE/FlOENxCAIhbmVWYdNmIMpWIJTQOMpF/+1JE2MfYUHfOnHWsAtuugWcBN4pcdFYgTQOzweZHU3
IEQm7aBM5nfKhsgWryOmcSEMkZBBLVJjjIwuIj9tmXoJGGWxEvUszXSWUG6iPAtzevIsYKMTN56d
jqrPT/y+4o5buZJx/w4qufnhbdtbemo8za0HW7sOTPWHHaFKtI6pwGSDLudVe1pS7UTs+A7pytPB
+Mz3F9+pCErPEfQvlyUXvl/4F9zJ/ALF9k9a19NXMAAAAABJRU5ErkJggg==
)
)+3
D.6sin(B+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAjCAYAAABGpiBAAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAANJJREFU
OE/FU9sNxDAI41bOOmzCHEyRJSivRGnKXf56SJWi1MImNh/RglMZ6FRwAjjT6yAWBLAJH1+j7mqA
EYX10AnF7zpJayTxO2oKZ2wBYhSoQV2oRUcHoZ+2TkYBg7ZVIOuiopOik4LyzESpybuAjElceE46
WN9/8bPFFrfSknH/n6gswudDptl7CtwOuP+8R8WcT4OrB1FbwmDU8I2xt6Ro6LILcmSoooU1GkEV
mV+7FaCgn9HxjD9Ep8YlwVP4zPX3RVh3LxeiWqlfgXk5vhcoRz5Wn9bxVgAAAABJRU5ErkJggg==
)
)+3
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